Carolyn Everson, vice president of global marketing solutions at Facebook Inc., speaks during a taping of "Women To Watch Round Table" for Bloomberg Television in San Francisco. Facebook is working on a location-based mobile-advertising product that will let companies target users with real-time data showing their whereabouts, Everson said in a telephone interview. (David Paul Morris/Bloomberg)

Jessica Herrin, chief executive officer for Stella & Dot, speaks during a taping of "Women To Watch Round Table" for Bloomberg Television in San Francisco. Stella & Dot is a San Francisco-based social sales company. (David Paul Morris/Bloomberg)

Selina Tobaccowala, vice president Product and Engineering at SurveyMonkey.com LLC., speaks during a taping of "Women To Watch Round Table" for Bloomberg Television in San Francisco. SurveyMonkey.com provides web-based survey solutions. (David Paul Morris/Bloomberg)